Receiver Tuning; Receive 12.5 Khz-Band Normal Squelch Tuning; Figure 5-7. Rx 12.5 Khz-Band Normal Squelch Tuning Window; Table 5-4. Receiver Squelch Tuning - Motorola CP185 Basic Service Manual

5-8
5.6

Receiver Tuning

There are 4 variations of Receive Squelch Tuning: 12.5 kHz-Band Normal Squelch, 12.5 kHz-Band
Tight Squelch, 25 kHz-Band Normal Squelch and 25 kHz-Band Tight Squelch.
5.6.1 Receive 12.5 kHz
1. Under the Alignment menu, select Rx Squelch, then select Squelch 12.5 kHz-band Normal.

(Figure 5-7. Rx 12.5 kHz-band Normal Squelch Tuning Window).

2. Apply a RF signal for current frequency point with minimum amplitude, -128 dBm (F1 being the
first).
3. Set softpot to minimum (0) and adjust the amplitude of RF signal to the range of normal squelch
tuning (as shown in Table 5-4.) on the test equipment.
4. Adjust the softpot value by using either the Left/Right arrows on the slider or Up/Down arrows on
the Working Softpot box until the radio is totally muted.
5. Repeat steps 2–4 for F2–F5.
6. Press Program to commit the softpot values into the codeplug.

Table 5-4. Receiver Squelch Tuning

Squelch Type
Normal
Tight
Band Normal Squelch Tuning
-
Figure 5-7. Rx 12.5 kHz-band Normal Squelch Tuning Window
Radio Programming and Tuning: Receiver Tuning
Tuning Range (dB)
6 – 8
15 – 17